Abstract: An underwater laser television, which radiates laser pulses, output from a laser oscillator, to a visualized object under water and detects reflection light of the laser pulses to display an image of the visualized object, is constructed by a main body which is located under water to have a capability of free movement and to resist against the water pressure and which provides a light transmission portion for transmitting the laser pulses and reflection light, the laser oscillator arranged inside of the main body, radiation and light receiving means, arranged in the main body, which radiates the laser pulses toward the visualized object and detects the reflection light to produce video signals of the visualized object, and display means, arranged in the main body, which displays an image of the visualized object based on the video signals.

Abstract: A simulation method for imaging of an underwater object is performed by simulating the object with a test panel having several strips of different brightness, and irradiating the test panel with a pulsed laser beam having three primary colors. From the reflected beam pulses, contrast values of the test stripes are computed for reflected pulses of each color in relation to the turbidity and visibility distance. The method may be used in conjunction with an imaging apparatus having a laser generation device which produces three primary colors of three different wavelengths; a laser beam detection device to receive the reflected beam pulses of respective primary colors, to determine intensities of the reflected beam pulses of respective primary colors, and to output three primary color signals to an image monitoring device.